Economic Evaluation of Systems that Expedite Inventory Information

Information delays exist when the most recent inventory information available to the Inventory Manager (IM) is dated. Such situations arise when it takes a while to process the demand data, count the inventory, and pass the results to the IM. We show that the optimal total inventory‐related cost decreases when the length of the information delay decreases. The amount of the decrease is an important datum for an IM interested in considering whether or not to invest in reducing the delay. The investment is required to finance design and acquisition of an information (collection and dissemination) system that can reduce the information delay. Such systems include phone calls, business meetings, and the use of information collection mechanisms such as radiofrequency identification tags.     

The Importance of Social Movements

This discussion was conducted with Professor Alain Touraine by Tim Jordan on 20 September in Paris. The discussion has been divided into headings that correspond to the areas of questions that were asked. The social context for the discussion is important in understanding Professor Touraine's comments because the discussion occurred 9 days after the World Trade Center and Pentagon attacks but before the bombing of Afghanistan began and with no chance of knowing what would follow.     

Gambling over the life course and treatment-seeking

The purpose of this study is to investigate change in gambling behaviours over the life course, and, correspondingly, the treatment-seeking behaviours of 86 people who met the criteria for at-risk (participants endorsing two to four items on the South Oaks Gambling Screen [SOGS]) and problem gamblers (participants endorsing five or more items on the SOGS) over the last five years. Data were obtained from informants during semi-structured interviews using Structured Clinical Interview for DSM-IV axis I and axis II disorders (SCID I and II), SOGS and treatment-seeking interviews. The results showed three groups of gambling behaviours over the life course. A first group started gambling early on and continued participating in recreational gambling until its participants were between 40 and 50 years of age, during which time they became problem gamblers. A second group transitioned from recreational gambling to problem gambling over a short period of time; its participants were aged between 40 and 50. Lastly, a third group which was exposed to gambling later on in life, mostly after retirement, developed gambling problems quickly. Psychopathology was prevalent in all groups, given that 98% suffered from a mental health problem during their life, and 62% within the last six months. Participants who made use of the services available mostly turned to medical and specialized mental services for brief periods, usually when in crisis. In terms of problem gambling, the results argue in favour of maintaining dedication toward treatment, especially in the presence of co-morbidity.     

Core Self‐Evaluations,Work–Family Conflict,and Burnout

This study investigated how core self‐evaluations relate to work–family (and family–work) conflict and burnout. Drawing from a sample of 289 police officers and civilian staff who were either married or living in a union as common‐law partners, this study advances an empirical integration of work–family and core self‐evaluations research. The results suggested that even when work, nonwork, and demographic variables are controlled for, positive core self‐evaluations (i.e., composite scale, self‐esteem, locus of control, emotional stability) are related to less work–family (and family–work) conflict. The associations between core self‐evaluations and burnout are partially mediated by work–family (and family–work) conflict. Finally, core self‐evaluations moderated the association between work–family conflict and burnout, but not the one between family–work conflict and burnout.     

A generalized linear model approach to seasonal aspects of wind speed modeling

The aim of the article is to identify the intraday seasonality in a wind speed time series. Following the traditional approach, the marginal probability law is Weibull and, consequently, we consider seasonal Weibull law. A new estimation and decision procedure to estimate the seasonal Weibull law intraday scale parameter is presented. We will also give statistical decision-making tools to discard or not the trend parameter and to validate the seasonal model.     

A fully nonparametric approach in survival models with explanatory variables

The most widely used model for multidimensional survival analysis is the Cox model. This model is semi-parametric, since its hazard function is the product of an unspecified baseline hazard, and a parametric functional form relating the hazard and the covariates. We consider a more flexible and fully nonparametric proportional hazards model, where the functional form of the covariates effect is left unspecified. In this model, estimation is based on the maximum likelihood method. Results obtained from a Monte-Carlo experiment and from real data are presented. Finally, the advantages and the limitations of the approacha are discussed.     

"Who believes most in me and in my recovery": the importance of families for persons with serious mental illness living in structured community housing

In this article, the authors report on qualitative findings on the role of family in supporting recovery for mental health consumers living in structured, community housing in a large Canadian city. Despite living separately from families and relying heavily on formal services, residents identified their families more often than mental health professionals, friends, and residential caregivers as those who most believe in them and their recovery. Families supported recovery by providing affection and belonging, offering emotional and instrumental support, and by staying actively involved with residents. Families are a vital, untapped resource for social workers in promoting independent living.     

Correction to: Optimality of deductible: a characterization,with application to Yaari’s dual theory

Theory and Decision -